Use some Bubble gum....bubble yum works the best, or double your pleasure and use wrigley
To be truthful, I dont remember seeing anything about this on any of the threads! Is there a space on the aftermarket grill for it or is it billlet all the way across?? If there is a space you can order on from caddy or Gmpd and stick it on there, otherwise if its just the billet, you will need something that will fit in between the billet strips to secure it as I doubt it will stick to just the billet strips.......in which case you will want to see what the manufacterer, EG, recommends.......Let us know what you find out, again this is just what comes to mind in the situation and may not be right....hopefully someone else can validate this or give you a better choice

Goodluck